Well, one possibility could be that Naruto discovers that his friends have been secretly working against him in some way, like lying about their intentions or using him for their own gains. Maybe they've been making deals behind his back that go against what he believes in.
It could be that Naruto realizes that everyone he trusts, including his mentors and friends, have been cheating him out of opportunities. For example, they might be taking credit for his achievements or not allowing him to reach his full potential on purpose. This would be a very dark and disheartening situation for Naruto.
Well, it could show Naruto being shunned by the village too. Since everyone thinks he has cheated in some way. His teachers might stop believing in him. The plot could revolve around Naruto's journey to prove his innocence. He might have to go on a solo mission to find evidence that clears his name, all while dealing with the emotional pain of being cheated on by those he trusted.
In the long run, Naruto might try to find a way to redeem those who cheated on him. Despite the pain, his kind heart would still hope for the best. He would likely try to understand their motives and see if there's a way to fix the broken relationships, while also being more cautious and less trusting in the future.
Ino could be a very complex character in this fanfiction. It's possible that she cheats on Naruto because she has a fear of commitment. Naruto is a very passionate and all - in kind of person, and that might scare Ino. So, to avoid getting too deep into the relationship, she cheats. Or perhaps there's a power struggle at play. She might think that being with a different person would give her more influence or status in the ninja world. And there could be a hidden agenda that she's following, something that she can't achieve with Naruto but believes she can with someone else.
He might also become more reserved in future relationships. After being cheated on by Anko, Naruto could be more cautious when it comes to getting close to someone again, always having that fear in the back of his mind that he could be betrayed once more.
Naruto might be heartbroken. He's a very emotional character, so he could cry a lot and feel a deep sense of loss.
One plot twist could be that the person who cheated on Naruto actually has a very good reason, like they were forced to do it to protect Naruto from a greater threat. Another could be that in ANBU, Naruto discovers that the cheating incident was part of a larger conspiracy against him. Maybe his new ANBU teammates turn out to be related to the cheater in some way, creating a lot of internal conflict for Naruto.
Well, it might be about a character with some sort of superpower that they can't control. Maybe they have a power of fertility that spreads uncontrollably, thus getting everyone pregnant. Another possibility is that it could be set in a post - apocalyptic world where a new form of radiation has the side - effect of causing pregnancy in all genders.
One possible plotline could be Naruto's initial shock and disbelief. He might go through a period of self - doubt, wondering what he did wrong. Another could be his journey to find himself again after such a betrayal. He might focus on his ninja training more intensely to distract himself from the pain.
One possible plot could be that Naruto is somehow corrupted. Maybe he's been influenced by a powerful dark force or a powerful enemy has tricked him into believing that everyone is a threat to the world he wants to protect. So, he decides to take extreme measures and kill everyone to 'create peace' in his warped sense.
In such a fanfic, the plot might start with Naruto's friends gradually turning against him due to false rumors spread by a hidden enemy. They could start to exclude him from missions and isolate him within the village. For example, Sasuke might believe the lies and challenge Naruto, thinking he has changed for the worse. This would lead to a series of battles where Naruto has to fight not only his former friends but also his own feelings of betrayal and confusion.